Either there is a bug here or I have extreme bad luck.
The first night is unplayable because I get attacked every time, no matter if the door is closed or not. If the door is closed, she attacks. If the door is open, she appears at the door and it won't close and you have a game over. Defeat is guaranteed.
But still, I find the idea behind the game quite fun and would be interested to see how the story progresses over the course of the nights.